It can be fun and creative to design an email campaign, but there are often some technical issues to deal with as well. As you work on your email marketing strategy, you may come across some very specific questions, like how much text is too much text? From a design point of view, what alignment looks best? What is the best size for images in emails?

Depending on your brand and message, your copy and design needs might be different, but there are some things you should always think about when choosing the best image file size for email, especially when you’re trying to get a campaign out the door.

Today, we’ll talk about the best sizes for images in emails, the dimensions of images in emails, and the best formats for images in email newsletters.

Let’s get started!

How to pick the best image file size for your campaign’s email visuals:
Start with a picture with a high resolution.
Use the right measurements.
Choose the right format for your newsletter. Start with a high-resolution image.
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It’s important to use the right size when putting images in emails. But before you resize your images, you should first find one that will still look good after being resized. In other words, your job will be easier if you use high-resolution images.

It’s easy to make a high-res image smaller, and most people won’t notice that the quality has gone down. On the other hand, when you try to stretch a small image, you usually end up with a pixelated image. This can hurt your campaign and even hurt the credibility of your brand.

High-quality images

Find the best image file size for email is only one thing to think about. You also need to find the best images for your campaign. But what should the pictures be? The answer is simple: high-resolution pictures.

It’s easy to find and use photos with a high resolution. Depending on how good your phone or camera is, you might be able to take your own photos and then just upload them to your computer. This is a good choice for marketers who are trying to plan their time and money.

Marketers also have a cheap option in stock photo sites. Stock photos are mostly free on sites like Pexels and Unsplash. There are also a number of other sites that offer free, paid, and high-priced photos.

If your campaign is for a specific group, you might want to hire a photographer. Digital tools are used by most professional photographers. Because of this, you can almost be sure to get a lot of high-resolution photos taken just for your brand. You can also keep editing and using these photos as your business changes.

High-resolution images

If you want your website to look more like you, you might choose graphics instead of photos. Illustrations and graphics can be very stylized, which may be perfect for your brand.

If you like to design, you might want to make your own graphics. Easy-to-use tools like Canva can make design easy and quick for people who are just starting out. If you’re looking for professional design tools, platforms like Adobe Illustrator, Sketch, and Procreate are good choices.

You can choose a freelancer or a stock site for graphics the same way you might choose a freelance photographer or a stock site for photos. The best places to find freelance designers are on Dribbble and Behance.

Online, it’s also easy to find both free and paid stock illustrations. Keep in mind, though, that vectors, which are images that don’t lose quality, will probably need to be changed into a different file format.

Taking away from your image

Once you have your image or images, you’ll probably need to reduce their size and maybe even change the file type. Photos will usually be changed to JPEGs, and graphics will be changed to PNGs. We’ll talk more about these file formats down below. But first, let’s talk about dimensions.

Use the right measurements.
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When looking for the best image file size for email graphics, it’s important to keep in mind that the size of an image depends on two things: its aspect ratio and its quality. Most images have different aspect ratios, like portrait, landscape, square, etc., so keeping image sizes the same helps your email look balanced. Learn as much as you can about your email platform and the sizes it supports. The bigger the picture, the more likely it is that an email filter or firewall will block it.

Size of mailing content for Emma: 480 x 480 or smaller

The recommended size for Emma mailing content is 480 x 480, but you can go smaller. For example, if your image isn’t a square, the sizes will probably look very different. Just make sure they’re smaller than 480 x 480.

Header images for Emma should be 600–700px wide and 100–200px high.

Header images can and should be a little bigger than the images that come after them (the ones in the content portion of your email). When using Emma’s email editor, you’ll need to change the size of your images so that they are no wider than 600-700px and no taller than 100-200px.

Make sure your newsletter is in the right file format.
Depending on the images you choose for your newsletter, it will probably need a certain file format. JPEGs, PNGs, and GIFs are the file types that everyone can use.

JPEGs have the worst quality of the three file types, but when used, they keep their colors. Since PNG images are better quality, they may take up more space. And you probably already know a lot about GIFs. Images and animations can loop in this file format.

When to use a JPEG

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Even though JPEGs aren’t as good as PNGs, they don’t take up as much space because they are highly compressed. JPEGs are also “lossy,” which means that they can show a wide range of colors.

JPEGs are often the best choice for photos because of this. JPEGs are a good way to show photos because they usually have a lot of colors. Also, when photos are changed to JPEG, viewers won’t notice if the image quality has gotten worse.

How to use PNG files

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JPEGs are great for photos, but they aren’t the best option for logos, graphics, or text. PNGs, on the other hand, offer a clear, crisp option for all three. Also, if your logo or graphic has a clear background, you can use it in an email with a PNG file.

When to use a GIF

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The GIF file format can be used for many different kinds of images because, unlike JPEGs, it keeps the quality of the image. Most of the time, animated GIFs are used, which can be a great addition to emails.

You can use a GIF to show a series of images of products, make an illustration move, or just make something look better. In the examples from Moo, Dropbox, and Adweek that follow, you can see how GIF files can be used in different ways.

Wrap up
You should now be able to choose the best image file size to use in your email campaigns. The header or content of a page can change the size of an image, so it’s important to choose the right dimensions and trim down images accordingly.

There are many kinds of files, but JPEGs, PNGs, and GIFs are the ones that most people can open and use. These formats are good for certain kinds of images, so think carefully about your images before you convert them.

As you can see, there is a lot more to choosing an image than its size. Whether it’s a graphic or a photo, the image you choose should have a high resolution and be relevant to your brand and message. Now that you know, what pictures are you going to use?